hick92 Posted January 3, 2012 Share Posted January 3, 2012 i know at your going to say but i've been looking for a couple hours and i can't find the one about a knock thats present at idle but go's away when reved up a little Link to comment Share on other sites More sharing options...
cruiser54 Posted January 4, 2012 Share Posted January 4, 2012 Loose flexplate to torque converter bolts. Link to comment Share on other sites More sharing options...
64 Cheyenne Posted January 4, 2012 Share Posted January 4, 2012 Loose flexplate to torque converter bolts. Thought the same thing on the GFs XJ, turned out the cat was toast and all the guts were rattling around inside it. Link to comment Share on other sites More sharing options...
Oizarod115 Posted January 4, 2012 Share Posted January 4, 2012 if its a light tapping it could be just normal 4.0L noise, they aren't exactly known for being quiet also if its more prominent after a cold start-up then goes mostly away it could be cold piston slap which is common and design induced, not a problem. Link to comment Share on other sites More sharing options...
hick92 Posted January 4, 2012 Author Share Posted January 4, 2012 no its horrid knock and does it at idle at any temp Link to comment Share on other sites More sharing options...
cruiser54 Posted January 4, 2012 Share Posted January 4, 2012 Check the flexplate bolts. 15 minute job. Link to comment Share on other sites More sharing options...
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